Bolt-anchor, blank therefor, and process for making same.



c. s. GIRVAN. BOLT ANCHOR, \NK THEREFOR, AND PROCESS FOR MMHWG SAME.

APPLlCATlON FILED OCT. 28. 1914.

Pmwmm No.8, MM.

C. S. GRRVAN.

BOLT ANCHOR, BLANK THEREFOR, AND PROCESS FOR MAlx'ING SAME. Awucmw FILED 001.28, yam.

Pawnmd 1mm. 3, mm.

a mmmsmmm 2.

, k v k 1 arranged that each tooth is placed over Qhe corrugation in which the top 0? ihe'boitthread travels, thereby strengthening and stifiening the gripping member. and at the same time the teeth form a ihiead i'hatz rviii tend to draw (he anchor into (he hoie should it be given a turning moiion while being set in place. a

The inset portion of the members 2. whethier ii is the centr: i part. as in Figs. 2, 8 and L); or the edges. as in Figs. 1 and 3.2 is ,q'i'eaior at one end than a? the other. In the specific embodiment shown in the drawings the inset portion of .he grip-- ping'members increases in depth from the end nea the body portion '1 ontwairii. This arrangementis dearly shown in i igs.

4-. 5 and 6. The object of this arlangrememx is to give an opening of decreasing diameter so that when a boh; is serewed into the anchor it will cause the members 2 to expand and firmly grip into the wail of the openi 1g; intowhich the anchor is-phiceii. If if. desired to make the inset deeper at Hie end nearest the body portion 1; the hoit wiii be screwed into a not which will be drawn inward toward the body portion 1 to expand the anchorv in the Weii known manner. 0 the expansion may be caused by the head of the bolt beingdrawn inwarci toward fihe bociy portion 1. i

It will be noted that in Figs. i M16; 9 the biank shows a. space between the gripping members 2, While the blank shown in i has'five members with pi'aci'icaiiy no space Whatever between them.

In mannfaetming the pieieri'ed foim of blanh and anchor. shfiwn in Figs. Tami 8, the hoies or openings 8 are made by punching the same or oihei'i'ise forming them and the members 2, 6 ami Z are separated by either punching; the members 6 and i clown wiiiie iioiding the members 2 in hoi-i zontai position or by punching one members 2 down While holding the members 6 and "T in horizonral position. The central portions of the-members 2, (Food '7 are then inset and, if desired, th 'eaded. After ihese operamons the whole piece IS bent upon ztseif along iizs longitudinal axis so as to form the piece in substantiallyi'uhnhu' form. Whoa so bout it assumes the shape shown in Fig. 53.

When it is (iesiabie to make the teeth conform to the thread tho biank is maaio in the shape shown. in Fig. 9--that is. with some space between the (iiiierent geipping members 2. In this case when it is desired "in haw five membm'a with. he poi'i' ion 31 of given diameter, the bianh is preferabiy made in fan shape. The members may he made wider at their outer emis than at their inner (m-is in ihe even? that :1 goon? cx 'iansion is iiesii-abie. When the edges of the members 2 are tinned out-w. '(L as in Figs. 2, 8 and 10, igho teeth aiithe outer and core the huh? I memes filo I'ccih in Che icnth some 2' ihc onh'i end ihe 6 into this openin;

pended and Eomfing hing. n: (he li o shape separmtmgg h each other U1. rectangu- 3 oi each of in gioiiion mi, [he

of 1:; e i m1 ifoimimy i'lh'fEPlFEii on vembeyst: and then bending; i ha 1 iiaiiy 'khe shape. simwn in (2 i). ii

1., it memi'ior i ias 'eiwi toga was by; ivoii'iing. hohi io ei i in any :sniiahib N xiii hr; 12 in. usnai nu... conr-si ere .i order to at "very imrpge 3 mm than rho use of izm' ii might iiiihwe vmis in made fol ci'iih ni iii :2, by. ('ii'ViCk" s showed nascent anchors, which consists in forming a blank bersattached thereto and extending in the same general direction, offsetting a portion of each of said members and bending said blank upon itself leaving an openingtherethrough.

. 2. The process olimaking bolt anchors from a four sided piece cit-sheet metal which consists in forming a plurality of members integral with abody portion at one end of the blank, offsetting the edges oft said members and bending said piece into substantially tubular shape along its major axis.

3. The process of making sheet metal bolt anchors, which consists in taking a 'four sided-blank of metal, punching a plurality of members therefrom, said members being united to a body portion at one end and eiitending to the other end of the anchor, olisetting a portion of each of said. members and bending said piece upon itself along its longitudinal axis leaving an opening therethrough.

4. The process of making sheet metal bolt I anchors which consists in taking a tour lib sided piece of metal with one side of length equal to the length of the anchor and an all-- jacent side of length equal to the circumfer' enco ot the anchor when complete, forming a plurality of members attached only along said second side and offsetting a portion of said incn'lbers and forming the piece into substantially tubular shape;

The process of making sheet metal bolt anchors which consists taking a four sided piece of metal having one side of length equal to the length-of the anchor and an ad.- jacent side of length equal to the circumference oi the anchor when complete, dividsaid piece into a plurality of members across said second side and separating said members to a greater. part of the d itance along said first side, offsetting a portion of each member and forming said piece into of each member formed thereby and forming said piece into tubular shape.

'2". The process of producing; a bolt anchor which consists in forming a blank with an arcuated side body and fan-like projecting segments and curving the body and segments int-o tubular form.

- 8. The process at" producing abolt anchor which consists in forming a blank with an arcuated side body and fan-likepro ecting segments and curving the body and segments into tubular form, with the body at one end and the segments projecting therefrom and insetting the segments into line withthe bore of the body to form a bolt anchor with the bore of the body or substantially the same diameter throughout and with a contracted throatin line with the bore.

9. The process of producing a bolt anchor which consists in "forming a blanltwith a side body at one end and'fandike projecting; segments extending to the other end thereof and curving the body and segments into tubularjtorm, with the body at one end and the segments projecting therefrom and in setting the segments into line with the bore of the body.

10. A blanlr out of which to form a bolt anchor having at one end a tour sided body portion with a plurality of adjacent mem bers separated except at the end having the said body portion.

posite end of the blank, each of said seg ments being-in angular relation to-an adjoining segment.

12. llblanlr out out which to form a bolt anchor comprising;- an arc-hire body at one end and a series of segments d sposed in fan-like relation thereto and extending to the other end thereott.

it. it blank out of which to form a bolt .anchor comprising an arc-like body at one end, and a series ot segments disposed in fandilre relation thereto" and extending to the other end thereof, each segment having a reduced neck portion where it joins the body.

l l. Al blanlr out oil which. to form a bolt anchor comprising an nrc-lilte'bodyat one Elli:

till

tilt

l no

lltl

end and a series of segments disposed in fan-litre relation thereto and eatendingr to the other end thereolt', each segment haying a. reducedneclr portion where it joins the body, the edges of the segments being, serrated and the middle portions thereof indented and such serrations and indentations terminating short of the neck portions.

15. A. blanlt out of which to term a bolt anchor comprising an arcuated body and a series of laterally disposed segments each in angular relation to the adjoining segment.

l6. A blank out or which toform a bblt anchor comprising an arcuated body and a series of segments each in substantiallygariial relation to thecurve of the arcuated 17. ll. blanloout oil which to term. a bolt I anchor comprising a curved body and a lllti series of laterally disposed segments each in substantially rec i211 relation to the curve of the body, each segment topering toward its outer end.

18. A blank out of which to form a. bolt :mchor comprising a curved body and 2t series of laterally disposed segn'ients each in substantially radial relation to the curve of the body, ouch segment being scored trainsverseiy to its center line by indentations in creasing in length as the center in zippronchecl.

19. A blank out of which to form a bolt anchor comprising a curved body/and series of laterally disposed eegments each in substantially redial relation to the curve of the body, each segment tapering from its outer end toward the center along redial lines.

20. A blank out of which to form at bolt anchor comprising an Mounted body, and a series of laterally disposed tapering inente attached thereto.

21.. A bolt anchor comprising a body portion, va pinrality oi members integrally 1ttached thereto, said inen'ibers having one edge thereof inturned t iroughont their length to form a bearing surface for an. en-

pension. member.

22. A bolt anchor comprising a body-portion. a lural.1t*- of members inte roll attached thereto, said members having teeti'r on an edge thereof and being intnrnect throughout their length so that the teeth thereon form a thread. I

A bolt anchor comprisin a bod i portion 01 substantially tubnlarsnepe, it phi rality of members integral therewith, said members having their central longitudinal ortions in elinement with said body or o l tion and their edges intnrned throughout ill on opening" of decreasing size t nfo-ng'h said anchor. 2.4 A bot anchor comprising 11 tubular .inset throughout their length to form a tapered opening through said anchor.

A boltnnclior comprising at sheet metal tubular open-ended body portion and :1 plurality of members projecting from one end thereof and integral therewith, said members tapering toward the body portion and having longitudiimlly disposed anchor-- ing portions in substantial nlinemeni' ivith the body port-ion, said members having their longitudinal edges inturned throughout their length to fern: :i tapered opening through said anchor and teeth on said edges arranged to form n thread.

A bolt anchor comprising a sheet metal tubular open-ended"hotly portion and a plurality of integral members projecting therefrom. said members having their longitudinel intnrned throughout their length, the interned portion of said edges being greater at the free ends thereof than at the ends adjacent the body portion, said inen'iloere having their central portion substantizilly ohnoi'nent with the body por- 4 T, I i in Wtnnonywhereof i hove signed my name to this epecifioetion 1n the presence of two subscribing witnesses.

CHARLES S. G-IRVAN.

lnw'roi: A. Burmese.

.nowm oeonn. 

